/*
 * Copyright (c) 2009 Frederic Daoud
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
package org.stripesbook.rayures.view.stripes;

import net.sourceforge.stripes.tag.InputLabelTag;
import org.stripesbook.rayures.exception.RequiredTagAttributeException;

/**
 * Corresponds to {@link InputLabelTag} and {@code <s:label>}.
 *
 * @author Frederic Daoud
 */
public class SLabel extends SInputSupport<InputLabelTag, SLabel> {
  public SLabel() {
    super(new InputLabelTag());
  }

  @Override
  protected void validate() throws RequiredTagAttributeException {
    if (getTag().getFor() == null && getTag().getName() == null) {
      throw new RequiredTagAttributeException("SLabel: one of name() or forId() must be specified.");
    }
  }

  public SLabel forId(String forId) {
    getTag().setFor(forId);
    return this;
  }

  @Override
  public String toString() {
    if (getChildren().isEmpty()) {
      String label = bundle.get(getTag().getFor());
      
      if (label != null) {
        add(label);
      }
    }
    return super.toString();
  }
}
